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Proceedings Paper

Silicon nanophotonics: light emission, wavelength-selective waveguiding and laser-induced thermal effects
Author(s): Leonid Khriachtchev; Markku Räsänen; Sergei Novikov
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Paper Abstract

Optical spectroscopic characterization of silica layers containing silicon nanocrystals (Si-nc) is described in detail. Red- NIR photoluminescence (PL) is studied and correlations of the PL with optical and structural properties are analyzed. The surface mechanism of PL involving Si=O bonds is supported by our results. Wavelength-selective optical waveguiding by Si-nc/SiO2 layers is studied. The found spectral filtering allows optical properties of Si-nc/SiO2 layers to be measured. Laser-induced thermal effects on structural and optical properties of free-standing Si-nc/SiO2 films are reported. The obtained results suggest very efficient Si-SiO2 phase separation by intense laser light. Laser-controlled stress of Si-nc in silica is demonstrated. The laser manipulations with Si-nc stress offer an approach to Si-nc memory with an extremely long retention time, which can be written, read, and erased by optical means.

Paper Details

Date Published: 22 May 2007
PDF: 11 pages
Proc. SPIE 6591, Nanotechnology III, 65910D (22 May 2007); doi: 10.1117/12.722135
Show Author Affiliations
Leonid Khriachtchev, Univ. of Helsinki (Finland)
Markku Räsänen, Univ. of Helsinki (Finland)
Sergei Novikov, Helsinki Univ. of Technology (Finland)

Published in SPIE Proceedings Vol. 6591:
Nanotechnology III
Fernando Briones, Editor(s)

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